Em Thu, 23 Mar 2017 17:04:21 -0700 peter@xxxxxxxxxxx escreveu: > With a manual setting of the device path and ID, the V4L2 Test Bench > produced this image from a JVC TK-1070U camera on a microscope. > http://easthope.ca/JVCtoPVR150screen.jpg > > Setting the device in the Test Bench each time it is opened becomes > tedious and no /etc/*v4l* exists. Can the default configuration be > adjusted permanently without recompiling? How? > > Although too dark, the image from the microscope slide is faintly > visible. The upper half of the image is on the bottom of the screen > and the lower half is at the top. On a VCR I might try adjusting > vertical sync. Is there an equivalent in the Test Bench? You could use v4l2-ctl to set all parameters you need in order to get a good quality image. It is possible to automatically call it by adding a udev rule. This link explains how to do things like that (although their examples are for different use cases): https://www.mythtv.org/wiki/Device_Filenames_and_udev Some of examples have a directive like: PROGRAM="..." With basically makes udev to run a program or script when the device gets detected. Thanks, Mauro
